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Contract OI history

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May 21, 2027 EXPIRATION

GSK $40.00 Put

GSK270521P00040000

Latest saved OI114Oct 23, 2026
Last change+2vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
GSK $40.00 put open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 114570 2026-10-02: 105 OI2026-10-05: 105 OI2026-10-06: 105 OI2026-10-07: 105 OI2026-10-09: 110 OI2026-10-13: 111 OI2026-10-14: 111 OI2026-10-15: 111 OI2026-10-16: 111 OI2026-10-21: 112 OI2026-10-23: 114 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

GSK contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing114+2
Oct 21, 2026112+1
Oct 16, 20261110
Oct 15, 20261110
Oct 14, 20261110
Oct 13, 2026111+1
Oct 09, 2026110+5
Oct 07, 20261050
Oct 06, 20261050
Oct 05, 20261050
Oct 02, 2026105No prior observation